Re: [PATCH] mm/mincore: allow for making sys_mincore() privileged

From: Dominique Martinet
Date: Wed Jan 16 2019 - 20:49:36 EST

Jiri Kosina wrote on Wed, Jan 16, 2019:
> So if noone sees any principal problem there, I'll happily submit it with
> proper attribution etc.

I'm not convinced just the write permission check is enough for
mincore(), as Josh also seems to share the concern I raised (e.g. map a
git directory "hot" pages)
We probably need to add an inode_owner_or_capable() or similar, the open
question is do we still need the write access check after that - I don't
really know how expensive these calls are.